Truck for railway rolling stock



NOV. 18, 1930. HALL 1,782,093

TRUCK FOR RAILWAY ROLLING STOCK Filed Jul 10, 1929 Y INVENTQR Faber) F H017 Laiel'a/l'esl sfance 50 scribed;

Patented Nov. 18, 1930 UNITED STATES PAT NT OFFICE ROBERT n-HniiL, or scHEnE'c'rnnY, NEW YORK TRUCK-FOR RAIL AY OLLING srocx Application filed July 10, 1929. serial No. 377,164.

In Fig. 1, the truck shown with thebol- This invention-relates generally to trucks for ra lway rolling stock of'the class or'type whereln lateral resistance devices are'provided,qas set forth inLetters Patent of the 1,512,463' and No.

' novel construction wherein-' the lateral re-' sistance shall slowly increase with respect to '15 the displacement of the bolster from a 'central position and will consume a minimum ofspace. 9

. The, improvement claimed is a "fully set forth. In theaccompanying drawings: Figure 1,

equipped with four point hangers embodying the invention;.-Fig.' 2, a section on'the M v1ine.IIII of Fig. 1; Fig. 3, aview similar to Fig. 1, except that the bolsteris shown deflected laterally; and, Fig. '4, a coordinate diagram illustrating the lateral resistance characteristics of the structure of Figs. 1 t 3 a In the practice of the invention,referring .descriptively to the specific embodiment thereof which is herein exemplified, as applied to a two wheeled locomotive truck of the swing or lateral motion,type,a frame 1, is suspendedthrough the intermediationjof springs.2,on theejournal boxes 3, of'anaxle 4, on which the wheels5 are secured. A swing. frame or bolster support 6, extends i from one to the other of the side members of "10 the truckIframel, to which it"is fixedat its ends, as by being'inade integral therewith or otherwise. The weight of thesjuperstruc- .ture'iof the. vehicle is primarily applied to the truck frame through the swing bolster 7, provided with meansffor pivotallyfengaging the center pin 8. The bolster 7, is suspended with the capacity for lateral movement relatively to the frame 6, by the swing hanger links 17 hereinafter dehereinafter v is a front View partly in section of a truck be varied in accordance with the ster 7*in normal or central position with respect to'the frame 6," as when the vehicle is on tangent track. Each of the links 17, are provided with seats for four pins, theupper two of which rest on the pins '13, and 14, attachedto the'frame 6, and the lower two support the pins 15 and 16, attached to thebolster; Inorder to obtainthe desired chara'cter of lateral resistance, the pinsare positioned as follows: l/Vhenthe bolster is central, as inFig. 1, a vertical-line is projected through the axis of the outermost loweror bolster p1ns'15, and theupper, orfra1ne pins "13; and 14, aregpositionedhorizontally, on I opposite sides'of saidvertical through pin I 15,'and the lower pin 16, isv suitably-positioned, horizontally, between the pin l5,and

obvious thatthe placement of the pins, may character of theresistance that is desired. I '1 By reference to F ig. 3, it will be seen that when the bolsterfiscommencesto deflect to Y the left, the effective bearings in-the right.- hand swing hanger link 17 are onthe pins 13 and 16, and in the left hand swing hanger link, on the pins 14 and 15. Fora given deflection of the bolster 7, theinclination to the vertical of the lines joining the axes, re-' spectively, of these effective pins is found to 'be greater; than in the three pointtype of suspension, and therefore, the initial lateral resistance, in proportion to the. load, will also be greater. Y

"Also, it'has been found, as will be'noted, from Fig. 3 that the tipping of the bolster or the deflection increases, due to the difference in the slopes of the supporting hangers,

tends to transfer a greater proportion of the weight imposed through the pivotal connec tion of the center pin 8,.to the left hand bolster pin 15, andthe effective inclination ofthe' left hand link 17, as denoted .bythe line passing through the axes of the effectivepins 14 and15,.being less than the effective inclination of the righthand link 17 as denoted by the line passing through the axes of the effective pins 13 and 16, it follows that the lateral resistance derived therethe central vertical plane of the truck" It is zontal returning force exertedat said pivotal bearing.

connection.

Were the application of the loadto the bolster applied in such a manner that the vertical axis through the center of gravity thereof remained at 'a constant, distance, horizontally from the axes of the effective bolster supportingpins, as, with reference to Fig. 3, the right hand'pin'16, and the left hand pin 15, a result commonly obtained in practice when the bolster and center pin are continuous or integral, the relation of lateral resistance would be expressed by the curve D of Fig. 4, wherein the said lateral resistance is shown to increase very rapidly with respect to the deflection.

The relative height of the pivotal connection between the center pin 8 and the bolster 7 is an important factor inthe design of the coacting parts to produce the desired character of lateral resistance illustrated by the curve F of Fig. 4:, if this said height be made materially less than that contemplated in the drawings, resistance characteristics result.

The invention claimed and secured by Letters Patent, is:

1. A swing hanger link for lateral motion railway trucks, having two upper and two lower bearings, the upper bearings being disposed on opposite sides of the middle line of exemplified by the curve E of Fig. 4, would desired to be the link at unequal distances from the lower bearings.

2. A sw ng hanger link for lateral motion railway trucks having two upper and two lower bearings, the two upper bearings being disposed, horizontally, on opposite sides of a vertical through the outermost lower .3. In a truck for railway vehicles, the combination of a frame; a weightsupporting bolster adapted. to traverse laterally relative thereto; pivotal means interposed between the bolster and the weight; and swing links supporting said bolster, and provided each with upper bearings and lower bearings so disposed that the distances between them are unequal.

4c. In a railway truck, the combination of a frame; a weight-carrying bolster adapted to traverse laterally relative thereto; pivotal bearing means for the weight on the bolster;

and swing hanger links supporting said bolster, and provided with two upper and two lower bearings, the upper bearings being disposed on opposite sides of a vertical through the outermost of the lower bearings, when the bolster is in normal central relation to the truck.

5. In a railway vehicle, a bolster adapted for lateral movement relative to'the vehicle frame structure; linkage means for supportmg the bolster from the vehicle frame structure at each side ofthe vertical center of the bolster; and a pair of bearings for each of the linkage means acting simultaneously when relative movement of the bolster and frame structure takes place, each of said pairs having an upper and-a lower bearing, thereby constituting upper and lower. pairs, the bearings of one of said last mentioned pairs being disposed normally at unequal distances from the said vertical center.

6. In a railway vehicle, a bolster adapted for lateral movement relative to the vehicle frame structure; linkage means for supporting the bolster from the vehicle frame structureateach side of the vertical center of the bolster; and apair of bearings for each of the linkage means acting simultaneously when relative movement of the bolsterand frame structure takes place whereby the b01- ster movesaway from one pair and toward the other pair of bearings, each of said pairs having an upper and a lower bearing, the bearings of the pair toward which the bolstermoves being spaced at a less distance from each other than the bearings of the other pair are spaced from each other, the upper and lower bearings of said pairs constituting upper and lower pairs of bearings, the bearings of one of said last mentioned pairs being disposed normally at unequal dis tances from the said vertical center.

7. In a railway vehicle, a bolster adapted for lateral movement relative to the vehicle frame structure; linkage means for supporting the bolster from the structure at each side of the vertical center of the bolster; and a plurality of bearings for the linkage means at both top and bottom thereof, arranged for selective grouping for simultaneous acting of the bearings of a group when said relative movement takes place, an upper and a lower bearing on one linkage means, and an upper and a lower bearing on the other linkage means forming a group, the bearings ofv the group forming upper and lower pairs, the bearings of one of said pairsbeing normally unequally spaced from said vertical center.

8. In a railway vehicle, a bolster adapted for lateralmovement relative to the vehicle frame structure; linkage means for supporting the bolster from the structure at each side of the vertical center of the bolster, the bolster during said lateral movement moving toward one of the linkage means and tamarind away from the other of the linkage means;

said relative movement takes place, an upper and a lower bearing on one linkage means,

and an upper and a lower bearing on the other linkage means of the group forming pairs, the bearings of the pair on the linkage means toward which the bolster moves being spaced at'a lesser distance from each other than the bearings of the other pair are spaced from each other.

ROBERT F. HALL. 

